I.I. Vulfson¹, Doctor of Technical Sciences (habil.), Professor of the Theoretical and Applied Mechanics Department, e-mail: jvulf@yandex.ru

The article presents the results of the studying oscillatory systems with a moving center of machine unit mass and close values of frequency characteristics. Such machines include textile, printing, shoe and many other technological machines, for which the variability of the center of mass position leads to the appearance of reonomic constrints. This is manifested in the non-stationarity of the frequency characteristics of the machine drive, to the appearance of dynamic effects associated with the excitation of parametric oscillations and the possibility of violation of the dynamic stability conditions. In order to reduce the vibroactivity of such systems, the article proposed a method for determining the threshold values of dissipative parameters. It has been established that the proximity of the partial frequencies of the mechanisms may cause non-desired mutual excitation of vibrations of the machine drive subsystems. The obtained results can be used to increase machine effectiveness, the accurate reproduction of the programmed movement of the working bodies, protect the operating personnel from vibration sickness and other negative oscillation influences.

Keywords: vibrations, reonomic constrints vibroactivity, parametric excitation, dynamic stability, beats.

References

1. Bolotin V.V. Dynamic Stability of Elastic Systems. M.: Gostekhteoretizdat, 1956. – 600 p.

2. Kolovskiy М.Z. Dynamics of Machines. L.: Mashinostroenie, 1989. – 280 p.

3. Vulfson I.I., Kolovskii M.Z. Nonlinear Problems of Machines Dynamics. L.: Mashinostroenie, 1968. – 284 p.

4. Vulfson I.I. Dynamic Analysis for Cyclic Mechanisms. L.: Mashinostroenie, 1976. – 328 p.

5. Vulfson I.I. Vibrations of Machines with Cyclic Action Mechanisms. L.: Mashinostroenie, 1990. – 309 p.

6. Vulfson I.I. Cyclic Machines’ Dynamics. S-Pb.: Politekhnika, 2013. – 425 p.

7. Vulfson I. Dynamics of Cyclic Machines. Heidelberg, New York, Dordrecht, London: Springer, 2015. – 410 p.

8. Kovaleva A., Manevitch L., Kosevich Yu. Fresnel integrals and irreversible energy transfer in an oscillatory system with time-dependent parameters // Physical Review E. 2011. V. 83. P.p. 026602-1-12.

9. Mandelshtam L.I. Lectures on the Theory of Vibrations. М.: Nauka, 1972. – 470 p.

10. Bogolubov N.N., Mitropolskii Ju.A. Asymptotic Methods of Nonlinear Vibrations Theory. M.: Fizmatgiz, 1958. – 408 p.

11. Mitropolskii Ju.A. Non-stationary Vibrations’ Asymptotic Theory Issues. M.: Nauka,  1964. – 432 p.

12. Panovko Ja.G., Gubanova I.I. Stability and Vibrations of Elastic Systems. М.: Nauka, 1967. – 420 p.

13. Panovko Ja.G. Mechanics of a Deformable Solid Body. М.: Nauka, 1985. – 288 p.

14. Vulfson I.I. Low-frequency vibration influence on nonlinear dissipative forces // Applied problems for the vibrations and waves nonlinear theory. Universities’ Proceedings. 2012. No 2. T. 20. P. 1–15.

15. Liapunov А.М. General Problem about Movement Stability. М.: Nauka, 1950. – 416 p.

16. Vulfson I.I. Nonlinear factors at mutual power and parametric excitation of vibrations in cyclic machines // Mechanical Engineering and Engineering Education. 2015. № 4 (45). P. 2–12.

17. Vulfson I.I. Dynamics of Machines. Vibrations: manual. М.: Urait Publishing House. 2017. – 274 p.

Sergey V. Polyakov¹, Post-graduate Student of Land Transport-technological Vehicles Dpt., e-mail: 555ots@mail.ru

Alexander E. Pushkarev¹, Professor, Ph.D. in Technical Sciences (habil.), Associate Professor of Land Transport-technological Vehicles Dpt., e-mail: pushkarev-agn@mail.ru

¹Saint Petersburg State University of Architecture and Civil Engineering

In the article there is described the issue of increasing safety at lifting rope operation. The algorithm for calculating the accepted value of the radius of undulation for the lifting rope with nonlinear dependencies is presented. An example of the calculation of the accepted value of the radius of undulation of the lifting rope with nonlinear dependences is given. The quantitative value of the accepted radius of undulation is determined, at which further operation of the rope is possible, recommendations for improving the safety of operation of the lifting rope are prepared.

Keywords: rope, deformation, accepted value, waviness, angle of the coil, the calculation of the rope.

References

1. Stiepanov A., Koskin A. A few words more on the properties of viscoelastic winding ropes //
Mining Hoisting ′96. Vol. 2: International Scientific and Teсhnical Conference; 8–10 October 1996, Gliwice, Poland. P. 65–68.

2. Khalfin М.N. Analysis of shaft hoist rope with account of inequality of its screw components physical-mechanical performance // Waste Treatment and Heading Vehicles and Equipment. 1988. P. 122–126.

3. Khalfin М.N. Analysis of steel ropes for diversification of geometric sizes and mechanical properties of wires // Bulletin of Northern Caucasus Region Higher Schools. Technical Sciences. 2005. Special Issue. P. 5–13.

4. Rules for Arrangement of Safe Operation of Passenger Aerial Tramways and Towing Ropeways. М.: NPO. ОBТ, 2003. – 80 p.

5. Rules for Arrangement and Safe Operation of Cargo Aerial Ropeways. М.: Nedra, 1995. – 29 p.

6. Kirianov D.V. Manual for MathCAD 11 Self-Instruction. Saint-Petersburg: BHV-Petersburg, 2003. – 560 p.

7. Glushko М.F., Malinovsky V.А., Shigarina L.I. Design of a long-lay wire rope with account of nonlinear deformations // Strength and Durability of Steel Ropes. 1981. P. 31–37.

8. Nonlinear equations of long-lay wire rope balance / М.F. Glushko et al. // Applied Mechanics. 1979. Nr. 12. P. 127–129.

9. Poliakov S.V. Equation of nonlinear static of a two-stranded rope with account of waviness // New Techniques of Technical Object Movement Control. Proc. of VII Inter. Scientific-Technic. Conf., Novocherkassk, December 14, 2005. – Rostov on Don: SKNC VSh, 2006. I. 6. P. 83–88.

10. Poliakov S.V. Equation of nonlinear static of a twisted rope with account of waviness // New Techniques of Technical Object Movement Control. Proc. of VII Inter. Scientific-Technic. Conf., Novocherkassk, December 14, 2005. – Rostov on Don: SKNC VSh, 2006. I. 6. P. 88–91.

11. Berezhinsky V.I., Shatilo А.N. Ropes of shift hoist unit. М.: Universitetskaya kniga, 2015. – 232 p.

Vladimir V. Martishkin¹, Ph.D. in Technical Sciences, Associate Professor of Standartization, Metrology and Sertification Department, e-mail: vmartishkin@mail.ru

Sergei A. Zaitsev ¹, Ph.D. in Technical Sciences, Professor, Head of Standartization, Metrology and Sertification Department, e-mail: saz@mami.ru

Yuliia A. Sepeseva¹, Postgraduate Student of Standartization, Metrology and Sertification Department, e-mail: sepeseva15@mail.ru

¹Moscow Polytechnic University

The study used the methodological framework of all-Russian codes 020-95 OK, OK and OK 021-95 022-95 to determine the generalized indicator of the quality of the parts. An algorithm is developed by which simultaneously with the definition of a generalized indicator of the quality of parts determine the probability of the yield of suitable and the number of Sigma in the tolerance parameter as an important criterion for the indicator of technological quality. With the help of the developed algorithm in the development of new or modernized equipment, it is possible to significantly reduce the number of adjustments to the CD and so on, the need for which arises from the results of testing of prototypes.

Keywords: quality of the part, the Russian national classification, technological code, the quality indicator code classifier.

References

1. OK 020-95 National Classification of Parts Produced with Welding, Soldering, Bonding and Thermal Cutting. M: Standards Publishing House, 1995.– 20 p.

2. OK 021-95 Russian classification of Parts and Engineering. M: Standards Publishing House, 1995. – 250 p.

3. OK 022-95 All-Russian Technological Classifier of Assembly Units of Mechanical Engineering and Instrument making. M: Standards Publishing House, 1995. – 70 p.

4. Manufacturability of a design of a product: the Reference book / Yu.D. Amirov, T.K. Alferova, P.N. Volkov et al. M.: Engineering. 1990. – 768 p.

5. Metrology. Textbook: 2nd edition/ A.A. Brukhovets, O.F. Viacheslavova, D.D. Gribanov et al. M.: FORUM, 2011.– 464 p.

6. Marugina V.M., Azgaldova G.G. Qualitative examination. Guide on Organization of Examination and Implementation of Qualitative Calculations. Book nr 3. Calculation Models of Quality. SPb., M.: Russian Register, 2002. – 517 p.

7. Design Features of the Engines of VAZ 21124 and VAZ  21126. URL: http://www.motors-vaz.ru (Date of apply: 07.07.2019).

8. Klepikov V.V., Bodrov A.N. Engineering Technology. M., Forum, 2008. – 860 p.

9. Probability Theory and Mathematical Statistics for Technical Universities I. Probability Theory/ O.L. Kritsky, A.A. Mikhalchuk, A.Yu. Trifonov et al. Tomsk: Publishing house of Tomsk Polytechnic University. 2010. – 214 p.

10. Quality Management. Textbook/ S.A. Zaitsev, E.I. Parfenyeva, O.F. Vyacheslavova, E.S. Blinkova, T.A. Lartseva. Novosibirsk: ANS “Sibak”, 2016. – 467 p.

Ludmila P. Andreeva¹, Ph.D. of Technical Sciences, Associate Professor of Welding Equipment and Technologies Dpt., e-mail: andree-va@mail.ru.

Viktor V. Ovchinnikov¹, Doctor of Technical Sciences (habil.), Academician of International Academy of Informatization, Professor of Material Science Department, e-mail: vikov1956@mail.ru;

Gulnara R. Latypova¹, Ph.D. of Technical Sciences, Associate Professor of Welding Equipment and Technologies Dpt., e-mail: Taksa2@yandex.ru.

Viktor V. Ovchinnikov¹, Doctor of Technical Sciences (habil.), Academician of International Academy of Informatization, Professor of Material Science Department, e-mail: vikov1956@mail.ru;

¹Moscow Polytechnic University

In the article the results of studying the magnesium content influence and alloy 01205 original state on its weldability and mechanical properties level of the obtained welded joints. It is shown, that in order to ensure the reliability of welded structures from the 01205 alloy the magnesium content allowed in the metal should be no more than 0,03 %. According to the research, the initial condition of the material does not significantly affect the mechanical properties of welded joints, heat-treated after welding.

Keywords: aluminum alloy, alloy 01205, chemical composition, magnesium, heat treatment, argon arc welding, welds, mechanical properties.

References

1. Kablov E.N. Aviation materials: results and prospects// Bulletin of the Russian Academy of Sciences. Vol. 72. No. 1. 2002. P. 3-12.

2. Fridljander I.N. Aluminium alloys is a promising material in engineering//  Mechanical Engineering and engineering education. 2004. No. 1. P. 33-37.

3. Davydov V.G., Teleshov V.V., Zakharov V.V. High-strength aluminium alloys Al-Cu-Mg-(Ag) for use at elevated temperatures// Aviation industry. 2005. No 1. P. 49-57.

4. Moran J. P., Bovard F. S., Chrzan J. D., Vandenburgh P. Corrosion Performance of New Generation Aluminum-Lithium Alloys for Aerospace Applications // 13th International Conference on Aluminum Alloys (ICAA13). — Hoboken, NJ, USA : John Wiley & Sons, Inc., 2012. P. 517–522.

5. Ehrstrum J.C., Warner T. Metallurgical Design of alloys for aerospace's Structures // ICAA7. 2000. V. 1. P. 5-16.

6. Wu M., Gao C.S. Effect of ultrasonic vibration on fatigue performance of AA 2024-T3 friction stir weld joints // Journal of Manufacturing Processes. 2017. No 29. P. 85–95.

7. Kumar S. Ultrasonic assisted friction stir processing of 6063 aluminum alloy // Archives of Civil and Mechanical Engineering. 2016. Vol. 16. P. 473–484.

8. Ultrasound enhanced friction stir welding of aluminum and steel: Process and properties of EN AW 6061/DC04-Joints / M. Thoma, G. Wagner, B. Strass et al. // Journal of Materials Science & Technology. 2018. Vol. 34. Iss.1. P. 163–172.

9. Drits A.M., Ovchinnikov V.V. Welding of Aluminum Alloys. M.: “Ore and metals” Publishing house, 2017. – 440 p.

10. Ishchenko A.Ya. Welding of aluminum alloys (areas of research conducted by IES. E. O. Paton)// Automatic welding. 2007. No 11. P. 10–13.

11. Ryazantsev V. I., Ovchinnikov V. V. Arc welding of heat-resistant aluminum alloys // Blanking productions in mechanical engineering. 2008. No. 2, P. 17-24.

12. Yakushin, B.F., Baculo A.V., Shiganov I.N. Improvement of weldability of heat-strengthened aluminum alloys // Nonferrous Metals. 2016. No 5. P. 79–84.

Nikolay F. Efremov¹, Doctor of Technical Sciences (habil.), Professor, Professor of Technology and Quality Control in Printing and Packaging  Production Dpt., e-mail: nf.efremov@mail.ru

Alexander  N. Utekhin ¹, Doctor of Technical Sciences (habil.), Professor, Professor of Technology and Quality Control in Printing and Packaging  Production Dpt., e-mail: alutekhin@yandex.ru

¹Moscow Polytechnic University

Polyplexes based on polyheteroarilenes represent a new class of structural materials that work in a wide temperature range from 73 to 573 K. Studies have shown that increasing the strength of their base – PM film is associated with the physical nature of the microdefects available in it. The possible causes of their occurrence and ways of elimination are shown, which open up the possibility for increasing the strength of polyplexes by 2–3 times and the prospect of creating innovative designs with previously unattainable properties.

Keywords: polyplexes, tensile strength, discrete strength levels, microdefects.

References

1. Efremov N.F., Severtsev S.A., Gudimov M.M. Polyplex materials in aircraft aggregate building // Aviation Industry. 1999. No 2. P. 50-60.

2. Efremov N.F. High-temperature frost-resistant polyplex film materials based on poly (diphenyl oxide) pyromellithimide: author. dis. of doctor of tech. sciences. - Moscow: MGATHT them. M. V. Lomonosov, 1997. - 47 p.

3. Polyimides - a class of heat-resistant polymers / M.I. Bessonov, M.M. Coton, V.V. Kudryavtsev, L.A. Layus. Leningrad: Science, 1983. – 328 p.

4. Sazanov Yu.N. Applied value of polyimides // Journal of Applied Chemistry. 2001. V. 74, No. 8. P. 1217–1233

5. Mikhaylin Yu.A. Heat-resistant polymers and polymeric materials. Saint -Petersburg: Profession, 2006. - 623 p.

6. Svetlichny V.M., Kudryavtsev V.V. Polyimides and the problem of creating modern structural composite materials // High-Molecular Compounds. 2003. T.45. No 6. P. 47-51.

7. Krutko E.T., Prokopchuk N.R., Globa A.I. Chemical modification of polypyromcelltimide // Polymeric Materials and Technologies. 2017. Vol. 3, No. 1. P. 33-46.

8. Krutko E.T., Prokopchuk N.R. Promising ways to create new heat-resistant materials based on polyimides // Works of BGTU. 2013. No 4. P. 145-149.

9. Babman T., Hamid Y. Preparation and properties of novel polyimides from 4-aril-2,6-bis (4-aminophenyl) pyridine // J. Polym. Sci. Part A, Polym. Chem. 2001. Vol. 39. No. 21. P. 3826–3831.

10. Matseevich T.A., Popova M.N., Askadsky A.A. Glass transition temperature and elastic modulus of polyimide-based nanocomposites // Bulletin of MGSU. 2015. No 6. P. 50-63.

11. Mechanical and thermal properties of nanocomposite films based on aromatic polyimide and carbon nanocones / I.V. Hoffman, I.V. Abalov, V.E. Yudin, V.G. Tyranov // Solid State Physics. 2011. T. 53. Iss. 7. P. 1433-1439.

12. Tsoy B., Lavrentiev V.V. Fundamentals of Creating Materials with Ultrahigh Physical Characteristics. M.: Energoatomizdat. 2004. - 400 p.

13. Stepnov M.N. Statistical Processing of Mechanical Test Results. M .: Mashinostroenie, 1972. - 232 p.

14. Bartenev G.M. Strength and Mechanism of Polymers Destruction. M.: Chemistry, 1984. - 280 p.

15. Tsoy B. Discrete levels of strength and durability of polymer films and fibers (dynamics, forecast): author. diss. of doctor chemical sciences. – M., MGATHT named after M.V. Lomonosov, 2000.

16. Strength levels and relaxation phenomena in polyimides / B. Tsoi, S.N. Karimov, V.K. Knyazev, P.V. Sidyakin, Yu.V. Kogay, V.V. Lavrentyev // Naval Forces. 1985. B27. No. 3. P. 176-182.

17. Basics of Plastics Processing Technology: a textbook for universities / S.V. Vlasov, A.L. Kalinchev, L.B. Kandyrin et al. M.: Chemistry, 1995. - 528 p.

18. Studies of polyimide films with protective coatings for spacecraft / V.N. Chernik, S.F. Naumov et al // Prospective materials. 2000. No 6. P. 14-21.

19. Fridman A., Chirokov A., Gutsol A. Nonthermal atmospheric pressure discharges //  J. Phys. D: Appl. Phys. 2005. No 38. P. 1-24.

20. Formation of charge states in polyimide films under the action of a discharge and their role in surface hydrophilization / A.I. Drachev, A.B. Gilman, A.A. Kuznetsov, V.K. Potapov // Plastics. 2003. No 5. P. 35-42.

21. Recrystallization of low-density polyethylene as a way to record information on multilayer films / I.V. Nagornova, E.B. Babliuk, A.N. Utekhin, V.P. Kondratov // News of Higher Educational Institutions. Problems of Printing and Publishing. 2015. No. 5. P. 37-46.

22. Efremov N. Innovations in manufacturing of flexible packaging // Materials, Methods & Technologies. 2014. Vol. 8. P.100-107.